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CompletedNCT01681953Updated Aug 3, 2020

A Placebo-Controlled Phase 3 Trial of Repeated Lamazym Treatment of Subjects With Alpha-Mannosidosis

A Phase 3 interventional study of Lamazym and Placebo in Alpha-Mannosidosis, sponsored by Zymenex A/S. Completed at 6 sites in 5 countries. Open to participants aged 5 Years to 35 Years. Per ClinicalTrials.gov, last updated 2020-08-03.

Sponsored by Zymenex A/S · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
25
Allocation
Randomized
Ages
5 Years to 35 Years
Sex
All
01

Study summary

The overall objective of this trial is to evaluate the efficacy and safety of repeated Lamazym i.v. treatment, compared with placebo, in subjects 5-35 years of age with alpha-Mannosidosis

02

Conditions studied

03

In context

Mannosidase Deficiency Diseases

21 studies on the registry are indexed under Mannosidase Deficiency Diseases; 3 are open to participants now.

This study's enrollment of 25 is above the median of 12 across 12 interventional studies indexed under Mannosidase Deficiency Diseases.

Browse Mannosidase Deficiency Diseases studies →

Lead sponsor

Zymenex A/S is the lead sponsor of 8 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
5 Years to 35 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Subject or subjects legally authorized guardian(s) must provide signed, informed consent prior to performing any trial-related activities
  • The subject and his/her guardian(s) must have the ability to comply with the protocol
  • The subject must have a confirmed diagnosis of alpha-Mannosidosis as defined by alpha-Mannosidase activity \< 10% of normal activity (historical data)
  • The subject must have an age at the time of screening ≥ 5 years and ≤ 35 years
  • The subject must have the ability to physically and mentally cooperate in the tests
  • The subject must have an ECHO without abnormalities that, in the opinion of the Investigator, would preclude participation in the trial

Exclusion criteria

Exclusion Criteria:

  • The subjects diagnosis cannot be confirmed by alpha-Mannosidase activity \< 10% of normal activity
  • The subject cannot walk without support
  • Presence of known chromosomal abnormality and syndromes affecting psychomotor development, other than alpha-Mannosidosis
  • History of BMT
  • Presence of known clinically significant cardiovascular, hepatic, pulmonary, or renal disease or other medical conditions that, in the opinion of the Investigator, would preclude participation in the trial
  • Any other medical condition or serious intercurrent illness, or extenuating circumstance that, in the opinion of the Investigator, would preclude participation in the trial
  • Pregnancy: Pregnant woman is excluded. Before start of the treatment the investigators will for women of childbearing potential perform a pregnancy test and decide whether or not there is a need for contraception
  • Psychosis; any psychotic disease, also in remission, is an exclusion criteria
  • Planned major surgery that, in the opinion of the Investigator, would preclude participation in the trial
  • Participation in other interventional trials testing IMP (including Lamazym) within the last 3 months
  • Adult patients who, in the opinion of the Investigator, would be unable to give consent, and who does not have any legal protection or guardianship
  • Total IgE >800 IU/ml
  • Known allergy to the IMP or any excipients (Sodium-Phosphate, Glycine, Mannitol)
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
25 participants (actual)

Study arms

  • Active comparator
    Lamazym

    1 mg Lamazym/kg body weight

    Drug: Lamazym

  • Placebo comparator
    Placebo

    Placebo is formulated as an isotonic phosphate buffer with glycine and mannitol

    Drug: Placebo

Interventions

  • DrugLamazym

    ERT, i.v. infusions weekly

    Also known as: rhLAMAN, recombinant human alpha-mannosidase

  • DrugPlacebo

    Infusions weekly

06

What researchers measure

Primary outcomes

  1. Reduction of oligosaccharides in serum

    Primary efficacy endpoint evaluated as change from baseline in the active group versus the placebo group

    Time frame: Baseline evaluation prior to first dose, midterm evaluation after 26 weeks, and end evaluation after 52 weeks

  2. The number of steps climbed in 3 minutes (3-minute stair climb test)

    Primary efficacy endpoint evaluated as change from baseline in the active group versus the placebo group

    Time frame: Baseline evaluation prior to first dose, midterm evaluation after 26 weeks, and end evaluation after 52 weeks

Secondary outcomes

  1. Forced Vital Capacity

    Secondary efficacy endpoint evaluated as change from baseline in the active group versus the placebo group

    Time frame: Baseline evaluation prior to first dose, midterm evaluation after 26 weeks, and end evaluation after 52 weeks

  2. The distance walked in 6 minutes (6-minute walk test)

    Secondary efficacy endpoint evaluated as change from baseline in the active group versus the placebo group

    Time frame: Baseline evaluation prior to first dose, midterm evaluation after 26 weeks, and end evaluation after 52 weeks

  3. Adverse Events

    Safety endpoint assessed weekly throughout the trial

    Time frame: 1 week

  4. Development of clinically significant changes in vital signs and change in physical examination

    Safety endpoints assessed weekly throughout the trial

    Time frame: 1 week

  5. Clinical laboratory parameters (hematology, biochemistry and urinalysis)

    Safety endpoints assessed weekly throughout the trial

    Time frame: 1 week

  6. Development of Lamazym antibodies and neutralizing/inhibitory antibodies

    Safety endpoints assessed weekly throughout the trial

    Time frame: 1 week

Other outcomes

  1. Quantitative determination of rhLAMAN in plasma

    Pharmacokinetic (PK) assessments. Blood samples are drawn pre-treatment and at various times post-treatment (see time frame above)

    Time frame: 10 min, 60 min, 2 hours, 24 hours, 3 days, 7 days

07

Study locations

6 sites
  • Center for Metabolic Diseases, Department of Clinical Genetics, Juliane Marie Centre, Copenhagen University Hospital, Blegdamsvej 9
    Copenhagen, DK-2100, Denmark
  • Hôpital Femme Mère Enfant, Lyon, 59 boulevard Pinel
    Bron, 69677, France
  • Hôpital Trousseau, Service de neuropédiatrie, Centre Référence des Maladies Lysosomales, 26 avenue du Docteur Arnold Netter
    PARIS Cedex 12, 75 571, France
  • Universitätsmedizin Mainz, Zentrum für Kinder- und Jugendmedizin, Langenbeckstrasse 1
    Mainz, 55131, Germany
  • The Children's Memorial Health Institute Warsaw, Department of Metabolic Diseases, Al Dzieci Polskich 20
    Warszawa, 04 730, Poland
  • Genetic Medicine, 6th floor, St Mary's Hospital, Oxford Road,
    Manchester, M13 9WL, United Kingdom
08

References and documents

Publications

  • Borgwardt L, Stensland HM, Olsen KJ, Wibrand F, Klenow HB, Beck M, Amraoui Y, Arash L, Fogh J, Nilssen O, Dali CI, Lund AM. Alpha-mannosidosis: correlation between phenotype, genotype and mutant MAN2B1 subcellular localisation. Orphanet J Rare Dis. 2015 Jun 6;10:70. doi: 10.1186/s13023-015-0286-x. PubMed 26048034 ↗
  • Borgwardt L, Thuesen AM, Olsen KJ, Fogh J, Dali CI, Lund AM. Cognitive profile and activities of daily living: 35 patients with alpha-mannosidosis. J Inherit Metab Dis. 2015 Nov;38(6):1119-27. doi: 10.1007/s10545-015-9862-4. Epub 2015 May 28. PubMed 26016802 ↗
  • Harmatz P, Cattaneo F, Ardigo D, Geraci S, Hennermann JB, Guffon N, Lund A, Hendriksz CJ, Borgwardt L. Enzyme replacement therapy with velmanase alfa (human recombinant alpha-mannosidase): Novel global treatment response model and outcomes in patients with alpha-mannosidosis. Mol Genet Metab. 2018 Jun;124(2):152-160. doi: 10.1016/j.ymgme.2018.04.003. Epub 2018 Apr 18. PubMed 29716835 ↗
  • Borgwardt L, Guffon N, Amraoui Y, Dali CI, De Meirleir L, Gil-Campos M, Heron B, Geraci S, Ardigo D, Cattaneo F, Fogh J, Van den Hout JMH, Beck M, Jones SA, Tylki-Szymanska A, Haugsted U, Lund AM. Efficacy and safety of Velmanase alfa in the treatment of patients with alpha-mannosidosis: results from the core and extension phase analysis of a phase III multicentre, double-blind, randomised, placebo-controlled trial. J Inherit Metab Dis. 2018 Nov;41(6):1215-1223. doi: 10.1007/s10545-018-0185-0. Epub 2018 May 30. PubMed 29846843 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 3, 2020, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT01681953
Lead sponsor
Zymenex A/S
Collaborators
European Commission
Responsible party
Sponsor
First posted
Sep 10, 2012
Start date
Aug 2012
Primary completion
May 2014
Completion
May 2014
Last update
Aug 3, 2020

Study contacts

Allan M Lund, MD
principal investigator · Copenhagen University Hospital, Center for Metabolic Diseases, Department for Clinical Genetics
Jens Fogh
study chair · Zymenex A/S

Oversight

Data monitoring committee
Yes
View the source record on ClinicalTrials.gov ↗

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